Develop Reference

WPF INotifyDataErrorInfo highlight ListBoxItem

I've got a ListBox as such:
<ListBox Margin="5" ItemsSource="{Binding NetworkAdapters, Mode=OneWay}" SelectedItem="{Binding SelectedNetworkAdapter}" SelectionChanged="{s:Action SelectedNetworkAdapterChanged}">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Columns="2" VerticalAlignment="Top"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Ellipse Width="15" Height="15" Margin="5">
<Ellipse.Style>
<Style TargetType="Ellipse">
<Setter Property="Fill" Value="Gray"></Setter>
<Style.Triggers>
<DataTrigger Binding="{Binding Status}" Value="{x:Static wpf:NetworkAdapterStatus.Up}">
<Setter Property="Fill" Value="Green"></Setter>
</DataTrigger>
<DataTrigger Binding="{Binding Status}" Value="{x:Static wpf:NetworkAdapterStatus.Down}">
<Setter Property="Fill" Value="Red"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</Ellipse.Style>
</Ellipse>
<StackPanel Margin="5,0,0,0">
<TextBlock Text="{Binding Name}" FontWeight="Bold"/>
<TextBlock Text="{Binding Description}"></TextBlock>
<TextBlock Text="{Binding Speed, StringFormat='Speed: {0}'}" FontSize="10"/>
<TextBlock Text="{Binding Status}" FontSize="10"/>
</StackPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
NetworkAdapters is a collection of View Models that implement INotifyDataErrorInfo.
With the current XAML, if there is an error in any of the View Models the whole ListBox will be highlighted red, but I would like just the single ListBoxItems that contains errors to be highlighted.
I had a look at similar questions such as:
WPF ListBox ErrorTemplate and
Validating a ListBoxItem rather than a ListBox
But I still can't make this work. Any help would be appreciated.
UPDATE:
As per Krzysztof's advice, I tried wrapping the StackPanel around a border and using a DataTrigger as such:
<ListBox.ItemTemplate>
<DataTemplate>
<Border BorderThickness="1">
<Border.Resources>
<Style TargetType="Border">
<Style.Triggers>
<DataTrigger Binding="{Binding HasErrors}" Value="True">
<Setter Property="BorderBrush" Value="Red"/>
</DataTrigger>
</Style.Triggers>
</Style>
</Border.Resources>
<StackPanel> ... </StackPanel>
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
However, what this produces is the following:
Which is slightly different from what I expected. I would like to have the highlight around the whole ListBoxItem not just part of it as per the image.

You need to implement an ItemContainerStyle as below:
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="BorderThickness" Value="1" />
<Setter Property="BorderBrush" Value="Transparent" />
<Style.Triggers>
<DataTrigger Binding="{Binding Validation.HasErrors}" Value="True">
<Setter Property="BorderBrush" Value="Red"/>
</DataTrigger>
</Style.Triggers>
</Style>
</ListBox.ItemContainerStyle>
This will enable you to change the border of the ListBoxItem itself, so the whole things as you want.

You can forget about ErrorTemplate and just use DataTrigger to bind to Validation.HasErrors:
<StackPanel>
<StackPanel.Resources>
<Style TargetType="{x:Type StackPanel}" BasedOn="{StaticResource {x:Type StackPanel}}">
<Style.Triggers>
<DataTrigger Binding="{Binding Validation.HasErrors}" Value="True"> <!-- change all text to red -->
<Setter Property="Foreground" Value="Red"/>
</DataTrigger>
</Style.Triggers>
</Style>
</StackPanel.Resources>
</StackPanel>
If you want a highlight, you can wrap StackPanel with a Border and set its color to red in a style.

Adjust Selected ListViewItem TextBlock Style

I am having a strange issue. I am not sure if this is a bug, or if I am simply misunderstanding something as I am fairly new to WPF (Probably the latter).
In my project, I have a ListView that displays items in a similar fashion to that seen of Windows Explorer using Icon view. I have outlined a control template that consists of a an Image element, and a TextBlock element below it. My goal is to adjust the maximum height of the TextBlock when the ListViewItem is selected. This is so the name of the Items will adjust from being trimmed with an ellipsis to showing the full name of the item.
When the item is selected however, instead of adjusting the maximum height of only the selected item's TextBlock, it adjusts all TextBlocks for each item whether it is actively selected or not.
I have researched for an answer, but have not found anything similar to this particular issue. This link is a similar concept, but without my problem.
WPF - ListView Item on Selected change Font size
Some of my other methods have consisted of one ControlTemplate with triggers for the style changes, or ItemContainerStyle instead of explicitly a ControlTemplate, which all seemed to give the same undesired result.
How can I achieve this functionality? Is it possible with ControlTemplate?
Here is some of my XAML code:
ListView
<ListView x:Name="ItemViewer">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Margin="10"/>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Margin" Value="10"/>
<Setter Property="Template" Value="{StaticResource ListViewItemNormal}"/>
<Style.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="True"/>
<Condition Property="Selector.IsSelectionActive" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Template" Value="{StaticResource ListViewItemSelected}"/>
</MultiTrigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
</ListView>
ControlTemplates
<ControlTemplate x:Key="ListViewItemNormal" TargetType="{x:Type ListViewItem}">
<Border x:Name="ItemBoxBorder" Background="Transparent">
<Grid HorizontalAlignment="Left" MinHeight="90"
Margin="5"
MaxWidth="90"
Width="90"
x:Name="ItemBox">
<StackPanel>
<Image HorizontalAlignment="Center"
VerticalAlignment="Top"
Source="{StaticResource NewImage}"
Width="64" Height="64"/>
<TextBlock x:Name="ItemDescription"
Text="{Binding Path=Name}"
HorizontalAlignment="Center"
VerticalAlignment="Bottom"
TextWrapping="Wrap"
MaxWidth="90"
MaxHeight="30"
TextTrimming="CharacterEllipsis"/>
</StackPanel>
<Grid.ToolTip>
<ToolTip Content="{Binding Path=Name}"/>
</Grid.ToolTip>
</Grid>
</Border>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="False"/>
<Condition Property="IsMouseOver" Value="True"/>
</MultiTrigger.Conditions>
<Setter TargetName="ItemBoxBorder" Property="Background" Value="{StaticResource HighlightMouseHoverColorBrush}"/>
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
<ControlTemplate x:Key="ListViewItemSelected" TargetType="{x:Type ListViewItem}">
<Border x:Name="ItemBoxBorder" Background="{StaticResource SelectedItemBrush}"
BorderBrush="{StaticResource HighlightBorderColorBrush}"
BorderThickness="1">
<Grid HorizontalAlignment="Left" MinHeight="90"
Margin="5"
MaxWidth="90"
Width="90"
x:Name="ItemBox">
<StackPanel>
<Image HorizontalAlignment="Center"
VerticalAlignment="Top"
Source="{StaticResource NewImage}"
Width="64" Height="64"/>
<TextBlock x:Name="ItemDescription"
Text="{Binding Path=Name}"
HorizontalAlignment="Center"
VerticalAlignment="Bottom"
TextWrapping="Wrap"
MaxWidth="90"
MaxHeight="125"
TextTrimming="CharacterEllipsis"/>
</StackPanel>
<Grid.ToolTip>
<ToolTip Content="{Binding Path=Name}"/>
</Grid.ToolTip>
</Grid>
</Border>
</ControlTemplate>
EDIT
Here is an example of the issue with ms_dos's implementation.
This image shows I have the item with a short description selected. This is the height all items should remain if they are not selected.
In this image, you'll see the item with the long description is selected. However, both items extend their height, but only the selected one should grow.

You don't need two separate control templates for this. Just take the ItemContainerStyle property of the ListView and use a control template like this:
<ListView x:Name="ItemViewer">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Margin="10" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListViewItem">
<Border x:Name="ItemBoxBorder"
Background="Green"
BorderThickness="1"
VerticalAlignment="Top">
<Grid HorizontalAlignment="Left"
MinHeight="90"
Margin="5"
MaxWidth="90"
Width="90"
x:Name="ItemBox">
<StackPanel>
<Image HorizontalAlignment="Center"
VerticalAlignment="Top"
Width="64"
Height="64" />
<TextBlock x:Name="ItemDescription"
HorizontalAlignment="Center"
VerticalAlignment="Bottom"
TextWrapping="Wrap"
Text="{Binding}"
MaxWidth="90"
MaxHeight="125"
TextTrimming="CharacterEllipsis" />
</StackPanel>
<Grid.ToolTip>
<ToolTip Content="{Binding Path=Name}" />
</Grid.ToolTip>
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected"
Value="true">
<Setter TargetName="ItemBoxBorder"
Property="Background"
Value="Red" />
<Setter TargetName="ItemDescription"
Property="TextElement.FontSize"
Value="20" />
<Setter TargetName="ItemBoxBorder"
Property="Height"
Value="135" />
</Trigger>
<Trigger Property="IsSelected"
Value="false">
<Setter TargetName="ItemBoxBorder"
Property="Height"
Value="90" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
</ListView>
Take a look at the ControlTemplate.Triggers section. Basically you use the Trigger property to control which property the trigger should handle... in our case the IsSelected from the ListView. And with the Setter you define the property and the value for the changes of the ListViewItem control. The TargetName of the Setter refers to the x:Name of the control which you define in the ControlTemplate section.
I hope this example helps you with your problem!
Greets
ms_dos

Border not lining up on a TextBlock

I am working on a chat program, and I would like to have a single line separate every line of text.
Here is the XAML I am using:
<ScrollViewer Grid.Row="0" Name="ScrollBar">
<ListView HorizontalContentAlignment="Stretch"
BorderThickness="0"
IsTabStop="False"
Name="AllItems"
Background="#E4E4E4"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
PreviewMouseWheel="AllItems_PreviewMouseWheel"
ItemsSource="{Binding Messages}">
<ListView.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Black"
BorderThickness="0, 1, 0, 0">
<TextBlock
FontSize="16"
TextWrapping="Wrap"
FontFamily="Arial"
Margin="0"
Initialized="ChatLine_Initialized"
VerticalAlignment="Center" />
</Border>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ScrollViewer>
I'm also setting the background of each line in alternating colors (this is an event handler for TextBlock's Initialize event):
static int s_curr;
void ChatLine_Initialized(object sender, EventArgs e)
{
int curr = Interlocked.Increment(ref s_curr);
if ((curr % 2) == 0)
((TextBlock)sender).Background = (SolidColorBrush)(new BrushConverter().ConvertFrom("#C8C8C8"));
else
((TextBlock)sender).Background = (SolidColorBrush)(new BrushConverter().ConvertFrom("#E4E4E4"));
}
The problem I'm running into is that the darker lines do not fill down to the border.
For example, here is how it renders:
How do I get the darker background to fill down to the border line?

Remove the border of your textblock and apply a style for the ListBox Items, this works,
<Grid>
<ScrollViewer Grid.Row="0" Name="ScrollBar">
<ListView HorizontalContentAlignment="Stretch"
BorderThickness="0"
IsTabStop="False"
Name="AllItems"
Background="#E4E4E4"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
ItemsSource="{Binding Messages}">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListViewItem">
<Border Name="Border" BorderBrush="Black" BorderThickness="1">
<ContentPresenter />
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<TextBlock
FontSize="16"
TextWrapping="Wrap"
FontFamily="Arial"
Text="{Binding Name}"
Initialized="ChatLine_Initialized"
/>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ScrollViewer>
</Grid>
Output:

There's no need to create a ListView wrapped in a ScrollViewer and then set each alternate row a different color. A DataGrid has all this functionality built in.
This can be tweaked, but is styled to represent your screen-shot:
<DataGrid HorizontalContentAlignment="Stretch"
BorderThickness="0"
IsTabStop="False"
Name="AllItems"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
ItemsSource="{Binding Messages}"
AlternationCount="2"
HeadersVisibility="None">
<DataGrid.CellStyle>
<Style TargetType="{x:Type DataGridCell}">
<Setter Property="Foreground" Value="Black" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="{x:Null}" />
<Setter Property="BorderBrush" Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
</DataGrid.CellStyle>
<DataGrid.RowStyle>
<Style TargetType="{x:Type DataGridRow}">
<Style.Triggers>
<Trigger Property="AlternationIndex" Value="0">
<Setter Property="Background" Value="#E4E4E4" />
</Trigger>
<Trigger Property="AlternationIndex" Value="1">
<Setter Property="Background" Value="#C8C8C8" />
</Trigger>
</Style.Triggers>
</Style>
</DataGrid.RowStyle>
</DataGrid>

How to change itemsControl stackpanel background color

Says I have a list of 10 items someList, I will show them on my page via itemsControl like below:
<ItemsControl DataContext="{Binding [someViewModel]}"
BorderBrush="Black"
ItemSource="{Binding someList}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Border BorderThickness="1" Background="Green">
<StackPanel MouseDown="{Binding Path=DataContext.someCommand,
RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type ItemsControl}}}"
Command Parameter="{Binding someID}">
<TextBlock Text="{Binding something}">
</StackPanel>
</Border>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
I do able to trigger someCommand method and I do able to pass in someID as input parameter. Now I'm wondering how to update the stackPanel background color, making it looks like "selected". Meaning now all item will have a green background, when I click on one of the stackpanel, that stackpanel should change background to red and change others back to green

If you want to use ItemsControl you can change ItemTemplate to RadioButton with custom ControlTemplate that will include Border which Background would change to Red when IsChecked == true:
<ItemsControl DataContext="{Binding [someViewModel]}" BorderBrush="Black" ItemSource="{Binding someList}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<RadioButton Content="{Binding something}" GroupName="radioGroup">
<RadioButton.Template>
<ControlTemplate TargetType="{x:Type RadioButton}">
<Border Background="Green" x:Name="PART_Border">
<ContentPresenter/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter TargetName="PART_Border" Property="Background" Value="Red"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</RadioButton.Template>
</RadioButton>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
However I don't see a reason why you cannot use ListBox with SelectionMode=Single (default value) and change Template of ListBoxItem:
<ListBox DataContext="{Binding [someViewModel]}" BorderBrush="Black" ItemSource="{Binding someList}">
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<Border Background="Green" x:Name="PART_Border">
<ContentPresenter/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter TargetName="PART_Border" Property="Background" Value="Red"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
or even do something like this, without changing Template:
<ListBox DataContext="{Binding [someViewModel]}" BorderBrush="Black" ItemSource="{Binding someList}">
<ListBox.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Red"/>
</ListBox.Resources>
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Background" Value="Green"/>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
In WPF it's generally much easier to pick a control that has functionality that you need and style it to look like you want then do this the other way round

why not do something like this
<DataTemplate>
<Border BorderThickness="1" Background="Green" x:Name="MyBorder">
<StackPanel MouseDown="{Binding Path=DataContext.someCommand,
RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type ItemsControl}}}"
Command Parameter="{Binding someID}">
<TextBlock Text="{Binding something}">
</StackPanel>
</Border>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding Path=IsSelected}" Value="true">
<Setter TargetName="MyBorder" Property="Background" Value="Black" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>

Disable blue border for selected Listview item

I have a ListView with Horizontal WrapPanel as its ItemsPanelTemplate.
I want to get rid of the blue background for selected item. It is visible only on the left of the selected item.
There are many similar question on SO and I tried a lot of the solutions and none of them worked.
This is what I have already tried:
<ListView.Resources>
<Style TargetType="{x:Type ListViewItem}">
<Style.Resources>
<!-- Foreground for Selected ListViewItem -->
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}"
Color="Black"/>
<!-- Background for Selected ListViewItem -->
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}"
Color="Transparent"/>
<!--SelectedItem without focus-->
<SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="Transparent"/>
</Style.Resources>
</Style>
</ListView.Resources>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<EventSetter Event="Control.MouseDoubleClick" Handler="HandleSelectedItemDoubleClick"/>
<Style.Triggers>
<Trigger Property="IsSelected" Value="true">
<Setter Property="RenderTransform">
<Setter.Value>
<ScaleTransform ScaleX="2" ScaleY="2" CenterX="12" CenterY="12" />
</Setter.Value>
</Setter>
<Setter Property="Panel.ZIndex" Value="150"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="BorderBrush" Value="{x:Null}" />
<Setter Property="Background" Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal" Width="210" Margin="15" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>

You need to overwrite the SystemColors.HighlightBrushKey for the ListView to be Transparent (or whatever color you want)
I typically put this in the ListView.Resources so it only applies to the specific ListView, and not all ListViews in my application
<ListView.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}"
Color="Transparent"/>
</ListView.Resources>
Its very close to what you have in your code already, but you need to set it for the ListView.Resources, not ListViewItem.Resources

To remove all default styling (hovering, selecting, etc.) just define a custom Template for the ItemContainer (not the Item itself):
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<ContentPresenter />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
Found on MSDN Forum

This is what did it for me:
<UserControl.Resources>
<DataTemplate x:Key="ItemTemplate">
<StackPanel Orientation="Vertical" Background="Transparent" Opacity="1" Width="185" MaxWidth="185">
<StackPanel Orientation="Horizontal">
<TextBlock
Margin="0,0,10,0"
Background="Transparent"
Foreground="DarkGoldenrod"
FontSize="12" FontStyle="Italic"
Text="{Binding Path=EventTypeName, Mode=OneWay}" />
<TextBlock
Background="Transparent"
Foreground="DarkGoldenrod"
FontSize="12" FontStyle="Italic"
Text="{Binding Path=AccountIdentity, Mode=OneWay}" />
</StackPanel>
<TextBlock
Background="Transparent"
Foreground="DarkGoldenrod" MaxWidth="170"
FontSize="12" FontStyle="Italic" TextTrimming="WordEllipsis" ToolTip="{Binding Path=EventMessage,Mode=OneWay}"
Text="{Binding Path=EventMessage, Mode=OneWay}" />
<TextBlock
Background="Transparent"
Foreground="Black"
FontSize="8"
Text="{Binding Path=EventLoggedOn, Mode=OneWay}"
TextTrimming="WordEllipsis"
ToolTip="{Binding Path=EventLoggedOn, Mode=OneWay}"
Margin="0,0,10,0" />
<StackPanel Orientation="Horizontal">
<TextBlock
Background="Transparent"
Foreground="Black"
FontSize="8"
Text="{Binding Path=QualifiedCreator, Mode=OneWay}" />
</StackPanel>
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="SelectedTemplate">
<StackPanel Orientation="Vertical" Background="LightGray" Opacity="1" Width="185" MaxWidth="185">
<StackPanel Orientation="Horizontal">
<TextBlock
Margin="0,0,10,0"
Background="Transparent"
Foreground="Yellow"
FontSize="12" FontStyle="Italic"
Text="{Binding Path=EventTypeName, Mode=OneWay}" />
<TextBlock
Background="Transparent"
Foreground="Yellow"
FontSize="12" FontStyle="Italic"
Text="{Binding Path=AccountIdentity, Mode=OneWay}" />
</StackPanel>
<TextBlock
Background="Transparent"
Foreground="DarkGoldenrod" MaxWidth="170"
FontSize="12" FontStyle="Italic" TextTrimming="WordEllipsis" ToolTip="{Binding Path=EventMessage,Mode=OneWay}"
Text="{Binding Path=EventMessage, Mode=OneWay}" />
<TextBlock
Background="Transparent"
Foreground="Black"
FontSize="8"
Text="{Binding Path=EventLoggedOn, Mode=OneWay}"
TextTrimming="WordEllipsis"
ToolTip="{Binding Path=EventLoggedOn, Mode=OneWay}"
Margin="0,0,10,0" />
<StackPanel Orientation="Horizontal">
<TextBlock
Background="Transparent"
Foreground="Black"
FontSize="8"
Text="{Binding Path=QualifiedCreator, Mode=OneWay}" />
</StackPanel>
</StackPanel>
</DataTemplate>
<Style TargetType="ListViewItem" x:Key="ContainerStyle">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="ContentTemplate" Value="{StaticResource ResourceKey=ItemTemplate}" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True" >
<Setter Property="ContentTemplate" Value="{StaticResource ResourceKey=SelectedTemplate}" />
</Trigger>
</Style.Triggers>
</Style>
</UserControl.Resources>

The simplest way to do this is to set the background to {x:Null} when the item is selected, using a trigger.
<ListView>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Style.Triggers>
<Trigger Property="IsSelected"
Value="True">
<Setter Property="Background"
Value="{x:Null}" />
<Setter Property="BorderBrush"
Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
...
</ListView>